ppc_amnet/amnet-shared/src/card.ts

import {encodeAccessCode} from "./card-encoding";

export const CARD_ID_REGEX = /^(?:[0-9]{4} ?){5}$/i;
export const AMNET_COMPANY_ID = 597;

export function generateCardNumber(): string {
    // serial between 5000 and 99999999999
    const serial = Math.floor(Math.random() * 99999994999) + 5000;
    return encodeAccessCode(AMNET_COMPANY_ID, serial, 0);
}

/**
 * Validates the provided card id by known parameters
 * @param id The card id to validate
 */
export function validateCardId(id: string): boolean {
    return id[0] !== '3' && CARD_ID_REGEX.test(id);
}